EZ-draw is GNU GPL free software to draw in C using Linux or windows

Instructions for installing EZ-Draw are available here:
  doc/en/html/ez-install.html

Les instructions pour installer EZ-Draw sont disponibles ici :
  doc/fr/html/ez-install.html

https://pageperso.lif.univ-mrs.fr/~edouard.thiel/ez-draw/index-en.html

EZ-Draw ("Easy Draw") is a small and minimalistic graphical toolbox for the C language, available on Linux, Mac OS X and Windows (all versions).

EZ-Draw is designed for learning event-driven programming and graphical interfaces. It lets you create windows in a very simple way, draw into them, respond to mouse and keyboard, make animations.

The heart of EZ-Draw consists of a single C module; it is internally based on Xlib library (Unix) and the win32 API (Windows).

A second module allows to read and display images in PNG, JPEG, GIF and BMP format. 

This is a test compilation using mingw compiler on Linux, then run wine64

See 0run.sh script and screenshot.png

